Hydraulic pumping unit



May 28, 1935. J, WMC UAID 2,003,004

HYDRAULI PUMPING UNIT Filed Nov. 22, 1933 5 Sheets-Sheet 1 Maylz8rl935-u. w; MQQUAID 0 2,003,004 v Y HYDRAULIC PUMPING UNIT Filed Nov. 22, 1955S'Sheets-Sheet 5 my I A rnmmfv y 3 J. w. M QUAID 2,003,004

HYDRAULIC PUMPING UNIT Filed Nov. 22, 1953 5 Sheets-Sheet 4 wn'usss: yg.A'r-ronutv y 8, 3 1 J. w. MCQUAID 2,003,004

' 'HYDRAULIC' PUMPINGQUNIVT 1 Filed Ndv. '22, 1933 Ballasts-sh et 5 jPatented May 2 8.1935 7 i r I I I I 2,003,004 in .mzpaimuc PUMPING UNITflames W. hfcquaidgoverton, Tex.

. AppiicflionNovember zz, 1933. ,Serial n taazrs I I "'j'icmimx wiso-sas l a 'Ihis invention relates-to a hydraulic pumping which are inconnected to the hydraulic unit and has for the primary objecttheprovision Jacks 2. 'l'hestems of the pistons have heads ll of adevice of the above stated character whereby to which are journaledthe'zouter'ends of connect a seriesio'f well pumps may be successfullyand ing rods I The connecting rods extend through economically operatedthrough hydraulic .pump slotsii into the crank case and arepivotally-con- 5 Jacks operated from a singlehydraulicvunit or nected toan anti-friction medium IS'formingi-Ta pump driven by -.a power source.1' 1; part of an eccentric IS. The eccentric is secured Withthese'andotherobjects in view this in to the power shaftl. The anti-frictionvention consists in certain novel-features of'conkis-in the formof innerandouter races l0 struction, combination and arrangementof parts ballsinterposed between said races and the inner l0 to be hereinafter morefully described and claimed. race is suitably connected tothe peripheryof the For a complete understandingof my invention, eccentric and'theouter race has pivoted thereto referenceis totbe had to'the followingdescription vthe inner ends ofthe connecting rods. 'I'hero-'andaccompanying-drawings; in which, i tation of, the power shaft 8 willimpart recipro- ,15 Figure l is a topplan view illustrating ahycationtoithe pistons through the eccentric i0 and draulic pumping unitconstructed in accordance "the connecting rods: The cylinders and pipesare with my invention. filled. with a fluid and this iluid is caused bythe Figure 2 is a vertical sectional view illustrating reciprocation ofthe pistons to move back and the hydraulic unit or pump. forth throughthe pipes i2 for the purpose of op- Figure3 isaside elevationillustrating the same. crating the hydraulic jacks which will hereoFigure 4 is a sectional-view taken on the line inafter more fullydescribed. 4-4 of Figure 2. ;-5.Each hydraulic jack consists of acylinder 20 Figure 5 is a fragmentary side elevation partly removablysecured to the top plate 2| of a supin section illustrating a iluidrecharging pump. port 1,! and the latter besidesconsisting 'of the asFigure 6 is a front elevation partly in section plate 2| also includeslegs bolted or otherwise 2 illustrating the same. secured to a baseplate 23 mounted upon a foun- Figure 7 is a horizontal sectional viewshowing dation 24 located at the mouth of the well and the manifoldconnection between the cylinders of through which the ordinary pumprigging 2! opthe recharging pump and its connection with the crates." Apiston, 20 is reciprocally mounted in fluid pipesof the hydraulic unit.the cylinder 20' and the stem thereof extends a Figure 8 is a frontelevation illustrating one of through the upperend of-said cylinder byway the hydraulic jacks. of a packing gland I1 and carries a head 28. to

Figure 9 is a side elevation illustrating the same. which are iournaledconnecting rods 20, the lower Figure 10 is-a sectional view taken on theline ends of which are secured to a beam 30 suitably l0-l0 of Figure 9.J secured to the pump rigging 25 so that upon re- 35 Figure 11 is afragmentary sectional view musciprocation of the piston 20, acorresponding trating a cylinder and piston of the hydraulic jackmovement will be imparted to the pump rigging. and a safety deviceapplied to the cylinder. The cylinderfll has a part II to which one ofReferring in detail to the drawings, the numeral the pipesliiflconnected. When the fluid in one 40 l indicates a hydraulic unit ordevice for actuatof the cylinders of the unit I is displaced thereing aseries or plurality of hydraulic pump jacks from, said fluid will beforced into the cylinder 2 and the hydraulic unit -i consists of a base3 20 of the pump-jack connected to the respective suitably mounted on afoundation 4 and formed cylinder of said'unit which will cause amovement integrally with a crank case 5 ot'cylindricalforof. the pistonof the pump jack in an upwardmation having removable end plates whichrotatdirection which carries therewith the pump riga ably support apower shaft 6 carrying at one end ging in an upward direction. Upon themovea pulley 'I or any other suitable medium for con ment of the piston01 the unit I outwardly of its necting the power shaft to a powersource(not respective cylinder the piston of the pump jack shown). Extendingradially from the crank case is lpiermitted to move downwardly in itsrespective 5 are cylinders 8 which are bolted or otherwise cy nder underthe weight'of the well rigging 50 secured to the crank case and each isequipped connected thereto.

with a piston 9 and the stem of the latter extends A reservoir 02 is.mountedpn the crank case.

outwardly through the outer end of the cylinder 5 of unit I- and has a.feed pipe ll connected by way of a packing gland ii. The inner ends ofthereto which is in turn connectedto a distribut as a the cylinc i ershave ports ll connected to pipes l2 ing head 34 and the latter iscarried uponand u" g connected to a manifold 35, and the latter connectspump cylinders 35. The pump cylinders are located at opposite sides ofone of the cylinders 8 of the unit I and have reciprocally mountedtherein pistons 31, the stems of which are con-' nected to the head|.3.,of the piston of the respective cylinder 8 of the unit l. Thedistributing head 34 has a pipe 38 connected thereto which is in turnconnected to a manifold 39 provided with branches 40, which areconnected to. the pipes i2 and said branches have "cut-off valves 4itherein. A check valve 40 is located in the pipe 38 to prevent backpressure in the manifold 39 from entering the distributing head-34. Thehead 34 is equipped with check valves 42 and 43.

The check valve 42 permits'fluid from the res-i ervoir 32 to be drawninto the manifold 35by the pump while the check valve 43 permits saidfluid to be exhausted from the manifold'35 to the manifold 39 by way ofthe pipe 38 and into the pipes I! when the valves 4| are opened. Withthis arrangement the hydraulic system can be at any time replenishedwith fluid.

' A suitable bypass means 46 maybe provided between the reservoir 32 andthe manifold 35 whereby the; fluid may be bypassed back to the reservoirwhen the system or the pipes I 2 thereof are properly filled with fluidand the valves closed.

Each hydraulic jack or thecylinder thereof is provided with a port 44 towhich a check valve 45 is connected. and the latter is connected to apipe 46 providing a retumto the reservoir 32.

The port 44 and the check valve 45 provide the hydraulic jack with a.safety device, that. is, should an excessive amount offluid be placed inthe system and there would be danger of forcing the piston of thehydraulic jack too far up in its respective cylinder, the piston willuncover the port 44 before reaching a point in the cylinder that wouldendanger-the construction of the head of'the cylinder by the'piston sothat the excessive amount of fluid may pass to the pipe and return tothe reservoir.

' Having described the invention, I claim:

- X hydraulic transmission system comprising a series of hydraulicallydriven elements, pipes connected to said elements, hydraulic cylindersgrouped radially with respect to one another and each connected with oneof said pipes, pistons operating in said cylinders, a common'crank casesupporting said cylinders, a power shaft jour naled in'said crank case,means between the pistons and the power shaft to reciprocate saidpistons, a supply reservoir mounted on the crank case, fluidrelease'means for said driven elements and connected to said reservoir,pumps mounted on one of said flrst named cylinders and actuated by the,piston of the latter, a manifold, means connecting said pumps'to thereservoir and to the pipes, check valves for said manifold means, and amanually controlled bypass means connected to the manifold means and tothe fluid release means adjacent thelatters connection to the'reservoir.

JAMES W.- MCQUAID.

